[jira] [Commented] (WW-4239) Using ParameterAware with FileUploadInterceptor leads to ClassCastException

[Letizia Cazora (JIRA)]

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https://issues.apache.org/jira/browse/WW-4239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13819917#comment-13819917
 ] 

Letizia Cazora commented on WW-4239:
------------------------------------

Hi all,
I developed a work-around, as I cannot wait for a new release and I have no 
time to test for an upgrade.

In my custom interceptor I added the following:

import javax.servlet.http.HttpServletRequest;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import org.apache.struts2.StrutsStatics;
import java.lang.reflect.Method;
import java.util.Enumeration;
import java.util.Map;
import org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper;
import org.apache.struts2.interceptor.ParameterAware;

public class CustomInterceptor extends AbstractInterceptor implements 
StrutsStatics {

    @Override
    public void init() {
    }

    @Override
    public void destroy() {
    }

    @Override
    public String intercept(ActionInvocation invocation) throws Exception {

public String intercept(ActionInvocation invocation) throws Exception {
       final ActionContext context = invocation.getInvocationContext();
       HttpServletRequest request = (HttpServletRequest) 
context.get(HTTP_REQUEST);
       Object action = invocation.getAction();
       if (action instanceof ParameterAware) {
            Method m = 
action.getClass().getDeclaredMethod("setMultiPartParameters", Map.class);
            if (m!=null){
                Map<String,Object> mpp = context.getParameters();
                if (request instanceof MultiPartRequestWrapper) {
                    MultiPartRequestWrapper mpr = 
(MultiPartRequestWrapper)request;
                    Enumeration<String> fileParams = 
mpr.getFileParameterNames();
                    while (fileParams.hasMoreElements()){
                        String fileParam = fileParams.nextElement();
                        mpp.put(fileParam, mpr.getFiles(fileParam));
                        mpp.put(fileParam+"FileName", 
mpr.getFileNames(fileParam));
                        mpp.put(fileParam+"ContentType", 
mpr.getContentTypes(fileParam));
                    }
                }
                m.invoke(action,mpp);
            }
        }
        ...
        return invocation.invoke();
}


in my action, which already implements ParameterAware, I added:

    private Map<String,Object> multiPartParameters;

and the setter method:

    public void setMultiPartParameters(Map<String, Object> multiPartParameters) 
{
        this.multiPartParameters = multiPartParameters;
    }

and use this new field instead of parameters

> Using ParameterAware with FileUploadInterceptor leads to ClassCastException
> ---------------------------------------------------------------------------
>
>                 Key: WW-4239
>                 URL: https://issues.apache.org/jira/browse/WW-4239
>             Project: Struts 2
>          Issue Type: Bug
>    Affects Versions: 2.3.15.1
>            Reporter: Ilya
>             Fix For: 2.3.17
>
>
> Ljava.io.File; cannot be cast to [Ljava.lang.String;
> ---------
> According to ParameterAware I should have method
> {code}
> public void setParameters(Map<String, String[]> parameters);
> {code}
> But I also have _File_ field and FileUploadInterceptor  sets file there.
> So, I am getting File[] instead of String[].



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